When a self-effacing hippopotamus and an inquisitive butterfly meet by chance at the river's edge, friendship is not an option. Or is it? Sara, a butterfly princess, decides to explore her clan's realm. Upon reaching the frontier, she discovers the river home of the hippopotami and meets Harry. Seeing their differences as beautiful, the two become fast friends. Harry and Sarah enjoy walking and talking together until, one day, Sarah disappears in a terrible thunderstorm. Harry believes Sara is dead until he learns she has been kidnapped! Only a fearsome battle among the trees can free Harry's delicate friend. This book is perfect for parents who are reading to their children and want a longer story to read over the course of a week, for example. Children beginning chapter books will find this book riveting and challenging.